These would have infinite solutions because this is a slope-intercept equation. Since you are provided with the y-intercept in both, you can put anything in for the slope and it will work.
Hope this helps!
Answer:
The dependent variable: the total cost
The independent variable: the amount of books
If the equation is y = 8x + 200
y would be the dependent variable and x would be the independent variable
I hope this helps.
Total cost = 0.95 x $150 + $5.50 = $142.50 + $5.50 = $148
The answer is 60 since the other shape has same answer for that side